[ gloo-tuh-thahy-ohn ]
/ ˌglu təˈθaɪ oʊn /

noun Biochemistry.

a crystalline, water-soluble peptide of glutamic acid, cysteine, and glycine, C10H17N3O6S, found in blood and in animal and plant tissues, and important in tissue oxidations and in the activation of some enzymes.

Origin of glutathione

First recorded in 1920–25; gluta(mic acid) + thi- + -one Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for glutathione

British Dictionary definitions for glutathione

/ (ˌɡluːtəˈθaɪəʊn, -θaɪˈəʊn) /


biochem a tripeptide consisting of glutamic acid, cysteine, and glycine: important in biological oxidations and the activation of some enzymes. Formula: C 10 H 17 N 3 O 6 S

Word Origin for glutathione

C20: from gluta (mic acid) + thi- + -one
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for glutathione

[ glōō′tə-thīōn′ ]


A tripeptide of the amino acids glycine, cystine, and glutamic acid occurring widely in plant and animal tissues and forming reduced and oxidized forms important in biological oxidation-reduction reactions.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for glutathione

[ glōō′tə-thīōn′ ]

A polypeptide consisting of glycine, cysteine, and glutamic acid that occurs widely in plant and animal tissues. It is important in cellular respiration in both plants and animals, and serves as a cofactor for many enzymes. It is a major protective mechanism against oxidative stress. For example, it protects red blood cells from hydrogen peroxide, a toxic byproduct of certain metabolic reactions.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.